A 4-year-old boy, whose hardworking dad was gunned down in Hell’s Kitchen in a possible case of mistaken identity, had one tearful wish for the holidays.

“Mommy, if Daddy’s in heaven, I just want him to fly down from the sky and spend Christmas with us,” little Eric Lopez said in the family’s cramped apartment in Elmhurst, Queens.

“He’s in your heart forever,” his mom, Gloria Huero, replied, barely able to choke back her tears.

Eric’s dad, Fausto Lopez, 40, a Mexican immigrant who toiled double shifts six days a week to feed his four kids, was shot dead by a drunken thug while walking from the subway to a second job in Manhattan on Nov. 12, police said.

There weren’t any presents to unwrap or a Christmas tree to admire or a turkey to adorn the table at the Lopez home on Christmas.

The children’s mom hasn’t paid this month’s rent, telephone or the electricity bill. She also has nearly $3,600 worth of hospital bills overdue.

“The financial burden is overwhelming,” the 38-year-old mother said. “I have four children to take care of, and I don’t know how I’m going to do it. We have no money. We have nothing now.”

Police said Anthony Reed, 27, a bloodthirsty con who has a rap sheet for attempted murder, was itching for a fight when he and another twisted punk stumbled upon the mild-mannered Lopez on Ninth Avenue and 48th Street at around 4 a.m.

The boozed-up Reed allegedly shot Lopez twice at point-blank range, possibly having mistaken the innocent passer-by for a man with whom he had quarreled outside the China Club a block away.

Reed should have been in jail, but authorities say he slipped through the cracks of the parole system and was back on the street despite a gun violation.

Big sister Nancy, 12, said she sees her worried mother crying all the time.

“My dad didn’t deserve that. He [the killer] needs to pay for what he did,” she said. “My family will never be the same.”

Narlene, 10, said, “Everything is so different. My little brother asks for [his father] all the time. He asks where he is and when he’s coming back.”

Guadalupe, who is 22 months old, waits by the door, hoping, too, her father will return.

“He was a good man, a family man that didn’t deserve this,” Huero said. “He spent over 20 years at that bar [where he worked]. He never had any problems.”

Huero recalled the last time she saw her loving husband. She said he kissed his children gently on their foreheads and whispered to her, “Take care of them.”

“Our family was happy once,” Huero said. “Now it’s broken. When that man killed my husband, he took part of us with him, too.”

Those wishing to help the family can send checks to: Gloria HueroFausto Lopez Fund, Citibank N.A., 87-11 Queens Blvd., Elmhurst, N.Y. 11373. Write “Project Angel Mom” on the memo line of the check.